摘要
正交频分复用(OFDM)技术是WiMAX系统的关键技术之一。在高速移动环境下,多普勒效应成为影响系统性能的关键因素。本文在介绍OFDM技术的基础上,对多普勒效应的频移估计进行研究,重点研究了高速环境下的多普勒频移估计算法。从仿真结果可知,采用有效的估计算法,可较好的抑制载波间干扰,改善系统性能。
Orthogonal Frequency Division Multiplexing （OFDM） is one of the key technologies of WiMAX system. The Doppler effect is a key factor impacted on system performance in high--speed mobile environment. This paper studied respectively Doppler shift estimation based on OFDM technology, and focuses on Doppler shift estimation algorithm in high--speed environment. From the simulation results, the effective Doppler shift estimation algorithm, can be better to restrain inter-- carrier interference, and improve system performance.
出处
《塔里木大学学报》
2009年第1期40-42,共3页
Journal of Tarim University
关键词
WIMAX
正交频分复用
多普勒频移
WiMAX
Orthogonal Frequency Division Multiplexing
Doppler Shift
